Originally Posted by
kc05 
But I’ve just ignored it. It just hurts that he can do and say such mean things and just move on like I never existed.
I tend to look at this the other way around. He can say and do such mean things because he only cares about himself.
I think that's different, because it actually has nothing to do with you personally. It is still hurtful to you, of course, but not affected by you.
As dandylion said, they are living in their own "bubble", his thoughts are about him and how wronged he has been and how terrible everyone has been to him and etc etc. This is also part of the justification for drinking as well.